Button.



No. 63l,2|6. Patented Aug. l5, l899.

H. KINDMANN.

BUTTON.

(Appnmmn medv Jam 31, 189s.)

(No Model.)

/N VENTOH A TTOHNE Y S.

muon.

PATENT HEINRICH KINDMANN, OF NEW YORK, N. Y.

BUTTON.

SPECIFICATION forming part of Letters Patent No. 631,216, dated August15, 1899.

Application filed January 31, 1898. Serial No. 668,638. (No model.)

drawings, forming a part of this specification,

in which similar characters of reference indicate corresponding parts inall the figures.

Figure 1 is a cross-section showing an apertured piece of fabric and thetwo parts of the button before their insertion therein. Fig. 2 shows thesame parts connected. Fig. 3 is a plan of the outer head of the button.Fig. 4 is a perspective view of the inner head or prong-head. Fig. 5 isa perspective View of the outer head, and Figs. 6 and 7 are viewscorresponding to Figs. l and 2 and showing the preferred form ofprong-head used in my invention.

In the form of construction illustrated by Figs. l to 5 the buttoncomprises an inner head A and an outer head B. The latter, being thenormally visible part of the button, may be suitably ornamented upon itseXterior surface, as shown in Fig. 3. The fabric C is apertured wherethe button is to pass through it, as at C. The inner head A consists ofa plate, from which projects an annularly-disposed series of prongs a,made of a suitable material, such as sheet metal, which is sufficientlyiiexible to enable them to be bent by the application of considerablepressure, yet stiff enough to prevent them from bending under ordinarystrains. The prongs inclose between them a central cavity adapted toreceive the central portion of the outer head, as will be describedpresently.

The outer head B is provided on its inner face with an annularfrusto-conical or funnelshaped groove b,'which surrounds a centralfrusto-conical portion or stem b of the outer head. The width of thegroove corresponds to the thickness of the material forming the prongsa, and the diameter of the groove at the inner surface of the head B isthe same as the diameter of the circumference at the points of the saidprongs. As shown in Figs. 1, 2, and 5, the head B may have an annularflange b2 surrounding the groove?) and adapted to enter the opening C inthe fabric C, form ing a guide forthe edge of the fabric at the hole.This construction is especially appropriate for use with thick fabrics.

The button is fastened by forcing the prongs a (by means of suitablemachinery) into the groove b, causing them to converge toward theirpoints. (See Fig. 2.) The material of the prongs is of sufficientstiffness to render an accidental separation of the two heads orsections practically impossible.

As shown in Figs. 6 and 7, the outer head B may be constructed inaccordance with Figs. l and 2. The innerheadAis constructedsubstantially as hereinbeforeI described, but the space between theprongs a is provided at the base of said prongs with an enlargenient orgroove a', extending outwardly and adapted'to receive thecircumferential rib b3, which is formed upon the portion b', when saidstem or core b is pressed into said central space of the prong-head. Itwill be obvious that in order to enable the core b to be transforniedbypressure from the shape shown in Fig. 6 to that shown in Fig. 7 it isnecessary that the outer head should consist of a material of sufficientplasticity, such as bone or celluloid. f

It will be understood that the term prongs will include pins, lugs, orany other suitable projections.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patente- 1. A button consisting of two sections orheads, one of which has an annular series of prongs projectingtherefrom, while the other has within its body a central frusto-conicalcore or stem tapering toward the interior of the head, said stem beingsurrounded, parallel to its peripheral surface, by an annular`frusto-conical groove adapted to receive the prongs of the other head,and an annular iiange projecting from said grooved head exteriorly ofthe groove and immediately adjacent thereto, to enter the'opening of thefabric.

IOO

2. A button consisting of two sections or by expansion, the groove ofthe other head, 1o heads, one of which has an annular series of thestein being surrounded, parallel to its peprongs projecting therefromand inolosing a ri pheral surface, by an annular frusto-conieal centralspace, said head having an outward groove adapted to receive the saidprongs.

y 5 enlargement or groove communicating with Y said space at the basesof the prongs, While HEINRICH KINDMANN the other head has Within :itsbody a central Vitnesses: frusto-conieal core or stem tapering towardPETER HOEFLER, the interior of the head and adapted to enter EMIL HESS.

